Agrostis gigantea

Redtop, a reference photo
Photo: Kristian Peters -- Fabelfroh 07:06, 19 August 2007 (UTC) · CC BY-SA 3.0 (licence)

Agrostis gigantea is a perennial flowering plant in the grass family Poaceae, known by the common names black bent and redtop.

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Redtop being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.

Easily confused with

Classification

Kingdom
Plantae
Phylum
Tracheophyta
Class
Liliopsida
Order
Poales
Family
Poaceae
Species
Agrostis gigantea

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